HP 3000 Manuals HP 3000 Manuals
shmdt
Detaches a process from a shared memory area.
Syntax
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
int shmdt (char *shmaddr);
Parameters
shmaddr Passes the address of the shared memory area (returned from a
call to shmat()).
Return Values
0 Success.
-1 An error occurred, and errno is set to indicate the error
condition.
Description
The shmdt() function detaches a shared memory area from the calling
process's data area. The address of the shared memory area is specified
by shmaddr (returned from a call to shmat()).
Implementation Considerations
None.
Errors
If an error occurs, errno is set to one of the following values.
EINVAL CAUSE shmaddr is not the data area start address of a
shared memory area.
ACTION Check to see that shmaddr is equal to the value
returned by a previous shmat() call.
ESYSERR CAUSE An operating system error occurred that does not map
directly to any of the above errors.
ACTION Examine the MPE/iX process error stack for the type
of system error.
See Also
shmat(), shmctl(), shmget(), SVID2 (Section 12)